Automatic train-stopping device.



A. e. ANDERSON. AUTOMATIC TRAIN STOPPING DEVICE.

APPLlCATION FILED JUNE 12, I913- 1,l%8,277w Patented July 27, 1915.

ARTHUR G. ANDERSON, 0F BRAYTON, IOWA.

AUTOMATIC TRAIN-STOPPING DEVICE.

Specification of Eetters Patent.

Patented July 27, 1915.

r Application filed June 12, 1913. Serial No. 773,263.

To all whom it may concern:

Be it known that I, ARTHUR G. Arman some citizen of the United States, residing at Brayton, in the county of Audubon, State of Iowa, have invented certain new and use ful Improvements in Automatic Train- Stopping Devices; and I do hereby declare the folloavirg to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to train stopping devices and has for an object to provide an extremely simple mechanism which will be operated by the semaphore at the entrance of a block to apply the air brakes and shut off the steam upon a train advancing into the block with the semaphore denoting that the block is closed.

A still further object of the invention is to provide an extremely simple mechanism which may be conveniently attached to the engine and will operate without fail to open the air valve and close the steam valve when actuated by the tripping device carried by the track.

A still further object is to provide a novel tripping mechanism carried by the track and operatively connected to the semaphore arm, such mechanism including a pair of vertically movable rods which are raised to project above the rails upon the semaphore arin being raised to denote a closed block, and which will be lowered below the tread surfaces of the wheels when the semaphore is lowered to denote an open block.

With the above objects in view the inven tion consists of certain novel details of construction and combination of parts hereinafter fully described and claimed, it being understood that various modifications may be made in the minor details of construction within the scope of the appended claim.

In the accompanying drawing illustrating this invention, Figure 1 is across sectional view through a track and showing the somaphore operated mechanism in elevation! Fig. 2 is a side elevation of the mechanism carried by the engine and showing the steam and air controlling valves diagrammatically. Fig. 3 is a view similar to Fig. 2 but showing the mechanism carried by the-engine as being tripped by the mechanism carried by the track. Fig. -=i is a longitudinal sectional view on the line 4:4 Fig. 2.

Referring now to the drawing in which,

. ment only. Joarnaled at the elbows in the box are angula levers 15 each having'o'ne leg pivotally attached to a respective rod 14. A link 16 is pivotally connected to the other legs of the angular levers and connects the levers for simultaneous movement. A stand rod 17 is connected to the semaphore arm and is connected in the box to an angular lever 18 which is in turn connected by a link 19 to the link 16. It will now be evident that-the rod 17 forms means for obtaming power from the semaphore arm to move the rods 14 up and down as desired according to the position of the arm. When the arm-showsthat-the block is closed the ends of the rods 14 will be disposed above the rails and when the arm shows that the block is open the rods will be disposed below the treads of the rails.

. Fig.2 shows diagrammatically the location of the air valve 20 and steam valve 21 in their relation to the air and steam valves 22 and 23 which the engineer controls, the valve 22 being the engineers aircontrol to the brakes while the valve 23 is his steam control to the cylinders. It will be seen that a bypass 2a is connected to the air pipe 25 and loops the engineers air valve 22, one end of the bypass being connected to that portion26 of the air pipe which leads to the pump or reservoir, and the other end of the bypass being connected to that portion 2i ofthe air pipe which leads to the train pipe. It will thus be seen that the valve 20 in this bypass when open forms a tne'ans for re leasing the air toward the brakes, when the engineers valve 22 is closed. It will further be seen that when the steam valve 21 is closed it forms means for shutting oil the steam to the cylinders when theengine'ers valve 23 is open. In carrying out my invention I providemeans for simultaneously opening the air valve 20 and closing the steam valve 21, such means being in the form of a single. lever28 which is connected to the stems of these valves and is adapted to be shifted to operate the valves as will presently be described.

An angular lever 29 is pivoted at its elbow in a suitable manner 011 the engine and has one leg connected to the lever 28. A

stand rod 30 is connected to the other leg of this angular lever and is preferably of such weight as when gravitating to rock the lever 29 and pull forwardly the lever 28 whereby to simultaneously open the air valve 20 and close the steam valve 21- thereby stopping the engine. The stand rod is normally held up by means of a trigger 31 which is pivoted intermediate the ends to the engine by means of a pivot pin 32 and is provided inthe top with a socket 33 which receives the lower end of the stand rod. The trigger is normally in upright position and is so disposed that the lower ends will contact with one of the rods 14 when the lat ter is in raised position whereby the trigger is tilted as shown in Fig. 3 and releases the stand rod 80 for instant gravitation.

The trigger 31 is flattened at the lower end as shown at 34 to produce a two-fold function, namely to assure of the trigger contaeting positively with the rod as above described, and to alsoweight the trigger at the lower end whereby the stand rod 30 is raised as will be described, the trigger will automatically return to operative position.

For raising the stand rod to operative position after each actuation, I provide a collar 35 on the stand rod and below the col lar an arm 86 is arranged to loosely receive the stand rod. The arm is connected to an operating lever 37 by means of a pair of links 38 connected to an angular rock lever 39. Upon gravitation of the stand rod the collar 35 will. drop into engagement with the arm 30. The engineer now operates applythe air and shut off the current on electric locomotives, such alterations including the substitution of a switch in the main circuit in lieu of the steam valve 21 above described.

What is claimed, is

In an automatic train controlling apparatus, the combination with means for controlling the motive power of an engine, of

a gravity controlled rod connected at one end, to said means, a weighted trigger pivoted to the engine beneath the rod, the upper end'of said trigger being provided with a socket to receive the free end of said rod and normally support the latter in raised position, a track obstacle adapted to impin'ge against the weighted end of the trigger to move the same out of engagement with the rod with a resultant gravitation of the latter to actuate said motive power controlling means, and a lever operable to raise said rod whereby said trigger will automatically return to its normal position.

In testimony whereof, I aflix my signature, in the presence of two witnesses.

ARTHUR G. ANDERSON. Witnesses J. W. CANNON,

RAYMOND ANDERSON. 

